/**
 * plugin.js
 *
 * Released under LGPL License.
 * Copyright (c) 1999-2015 Ephox Corp. All rights reserved
 *
 * License: http://www.tinymce.com/license
 * Contributing: http://www.tinymce.com/contributing
 */

/*global tinymce:true */

tinymce.PluginManager.add('charmap', function (editor) {
    var isArray = tinymce.util.Tools.isArray;

    function getDefaultCharMap() {
        return [
            ['160', 'no-break space'],
            ['173', 'soft hyphen'],
            ['34', 'quotation mark'],
            // finance
            ['162', 'cent sign'],
            ['8364', 'euro sign'],
            ['163', 'pound sign'],
            ['165', 'yen sign'],
            // signs
            ['169', 'copyright sign'],
            ['174', 'registered sign'],
            ['8482', 'trade mark sign'],
            ['8240', 'per mille sign'],
            ['181', 'micro sign'],
            ['183', 'middle dot'],
            ['8226', 'bullet'],
            ['8230', 'three dot leader'],
            ['8242', 'minutes / feet'],
            ['8243', 'seconds / inches'],
            ['167', 'section sign'],
            ['182', 'paragraph sign'],
            ['223', 'sharp s / ess-zed'],
            // quotations
            ['8249', 'single left-pointing angle quotation mark'],
            ['8250', 'single right-pointing angle quotation mark'],
            ['171', 'left pointing guillemet'],
            ['187', 'right pointing guillemet'],
            ['8216', 'left single quotation mark'],
            ['8217', 'right single quotation mark'],
            ['8220', 'left double quotation mark'],
            ['8221', 'right double quotation mark'],
            ['8218', 'single low-9 quotation mark'],
            ['8222', 'double low-9 quotation mark'],
            ['60', 'less-than sign'],
            ['62', 'greater-than sign'],
            ['8804', 'less-than or equal to'],
            ['8805', 'greater-than or equal to'],
            ['8211', 'en dash'],
            ['8212', 'em dash'],
            ['175', 'macron'],
            ['8254', 'overline'],
            ['164', 'currency sign'],
            ['166', 'broken bar'],
            ['168', 'diaeresis'],
            ['161', 'inverted exclamation mark'],
            ['191', 'turned question mark'],
            ['710', 'circumflex accent'],
            ['732', 'small tilde'],
            ['176', 'degree sign'],
            ['8722', 'minus sign'],
            ['177', 'plus-minus sign'],
            ['247', 'division sign'],
            ['8260', 'fraction slash'],
            ['215', 'multiplication sign'],
            ['185', 'superscript one'],
            ['178', 'superscript two'],
            ['179', 'superscript three'],
            ['188', 'fraction one quarter'],
            ['189', 'fraction one half'],
            ['190', 'fraction three quarters'],
            // math / logical
            ['402', 'function / florin'],
            ['8747', 'integral'],
            ['8721', 'n-ary sumation'],
            ['8734', 'infinity'],
            ['8730', 'square root'],
            ['8764', 'similar to'],
            ['8773', 'approximately equal to'],
            ['8776', 'almost equal to'],
            ['8800', 'not equal to'],
            ['8801', 'identical to'],
            ['8712', 'element of'],
            ['8713', 'not an element of'],
            ['8715', 'contains as member'],
            ['8719', 'n-ary product'],
            ['8743', 'logical and'],
            ['8744', 'logical or'],
            ['172', 'not sign'],
            ['8745', 'intersection'],
            ['8746', 'union'],
            ['8706', 'partial differential'],
            ['8704', 'for all'],
            ['8707', 'there exists'],
            ['8709', 'diameter'],
            ['8711', 'backward difference'],
            ['8727', 'asterisk operator'],
            ['8733', 'proportional to'],
            ['8736', 'angle'],
            // undefined
            ['180', 'acute accent'],
            ['184', 'cedilla'],
            ['170', 'feminine ordinal indicator'],
            ['186', 'masculine ordinal indicator'],
            ['8224', 'dagger'],
            ['8225', 'double dagger'],
            // alphabetical special chars
            ['192', 'A - grave'],
            ['193', 'A - acute'],
            ['194', 'A - circumflex'],
            ['195', 'A - tilde'],
            ['196', 'A - diaeresis'],
            ['197', 'A - ring above'],
            ['198', 'ligature AE'],
            ['199', 'C - cedilla'],
            ['200', 'E - grave'],
            ['201', 'E - acute'],
            ['202', 'E - circumflex'],
            ['203', 'E - diaeresis'],
            ['204', 'I - grave'],
            ['205', 'I - acute'],
            ['206', 'I - circumflex'],
            ['207', 'I - diaeresis'],
            ['208', 'ETH'],
            ['209', 'N - tilde'],
            ['210', 'O - grave'],
            ['211', 'O - acute'],
            ['212', 'O - circumflex'],
            ['213', 'O - tilde'],
            ['214', 'O - diaeresis'],
            ['216', 'O - slash'],
            ['338', 'ligature OE'],
            ['352', 'S - caron'],
            ['217', 'U - grave'],
            ['218', 'U - acute'],
            ['219', 'U - circumflex'],
            ['220', 'U - diaeresis'],
            ['221', 'Y - acute'],
            ['376', 'Y - diaeresis'],
            ['222', 'THORN'],
            ['224', 'a - grave'],
            ['225', 'a - acute'],
            ['226', 'a - circumflex'],
            ['227', 'a - tilde'],
            ['228', 'a - diaeresis'],
            ['229', 'a - ring above'],
            ['230', 'ligature ae'],
            ['231', 'c - cedilla'],
            ['232', 'e - grave'],
            ['233', 'e - acute'],
            ['234', 'e - circumflex'],
            ['235', 'e - diaeresis'],
            ['236', 'i - grave'],
            ['237', 'i - acute'],
            ['238', 'i - circumflex'],
            ['239', 'i - diaeresis'],
            ['240', 'eth'],
            ['241', 'n - tilde'],
            ['242', 'o - grave'],
            ['243', 'o - acute'],
            ['244', 'o - circumflex'],
            ['245', 'o - tilde'],
            ['246', 'o - diaeresis'],
            ['248', 'o slash'],
            ['339', 'ligature oe'],
            ['353', 's - caron'],
            ['249', 'u - grave'],
            ['250', 'u - acute'],
            ['251', 'u - circumflex'],
            ['252', 'u - diaeresis'],
            ['253', 'y - acute'],
            ['254', 'thorn'],
            ['255', 'y - diaeresis'],
            ['913', 'Alpha'],
            ['914', 'Beta'],
            ['915', 'Gamma'],
            ['916', 'Delta'],
            ['917', 'Epsilon'],
            ['918', 'Zeta'],
            ['919', 'Eta'],
            ['920', 'Theta'],
            ['921', 'Iota'],
            ['922', 'Kappa'],
            ['923', 'Lambda'],
            ['924', 'Mu'],
            ['925', 'Nu'],
            ['926', 'Xi'],
            ['927', 'Omicron'],
            ['928', 'Pi'],
            ['929', 'Rho'],
            ['931', 'Sigma'],
            ['932', 'Tau'],
            ['933', 'Upsilon'],
            ['934', 'Phi'],
            ['935', 'Chi'],
            ['936', 'Psi'],
            ['937', 'Omega'],
            ['945', 'alpha'],
            ['946', 'beta'],
            ['947', 'gamma'],
            ['948', 'delta'],
            ['949', 'epsilon'],
            ['950', 'zeta'],
            ['951', 'eta'],
            ['952', 'theta'],
            ['953', 'iota'],
            ['954', 'kappa'],
            ['955', 'lambda'],
            ['956', 'mu'],
            ['957', 'nu'],
            ['958', 'xi'],
            ['959', 'omicron'],
            ['960', 'pi'],
            ['961', 'rho'],
            ['962', 'final sigma'],
            ['963', 'sigma'],
            ['964', 'tau'],
            ['965', 'upsilon'],
            ['966', 'phi'],
            ['967', 'chi'],
            ['968', 'psi'],
            ['969', 'omega'],
            // symbols
            ['8501', 'alef symbol'],
            ['982', 'pi symbol'],
            ['8476', 'real part symbol'],
            ['978', 'upsilon - hook symbol'],
            ['8472', 'Weierstrass p'],
            ['8465', 'imaginary part'],
            // arrows
            ['8592', 'leftwards arrow'],
            ['8593', 'upwards arrow'],
            ['8594', 'rightwards arrow'],
            ['8595', 'downwards arrow'],
            ['8596', 'left right arrow'],
            ['8629', 'carriage return'],
            ['8656', 'leftwards double arrow'],
            ['8657', 'upwards double arrow'],
            ['8658', 'rightwards double arrow'],
            ['8659', 'downwards double arrow'],
            ['8660', 'left right double arrow'],
            ['8756', 'therefore'],
            ['8834', 'subset of'],
            ['8835', 'superset of'],
            ['8836', 'not a subset of'],
            ['8838', 'subset of or equal to'],
            ['8839', 'superset of or equal to'],
            ['8853', 'circled plus'],
            ['8855', 'circled times'],
            ['8869', 'perpendicular'],
            ['8901', 'dot operator'],
            ['8968', 'left ceiling'],
            ['8969', 'right ceiling'],
            ['8970', 'left floor'],
            ['8971', 'right floor'],
            ['9001', 'left-pointing angle bracket'],
            ['9002', 'right-pointing angle bracket'],
            ['9674', 'lozenge'],
            ['9824', 'black spade suit'],
            ['9827', 'black club suit'],
            ['9829', 'black heart suit'],
            ['9830', 'black diamond suit'],
            ['8194', 'en space'],
            ['8195', 'em space'],
            ['8201', 'thin space'],
            ['8204', 'zero width non-joiner'],
            ['8205', 'zero width joiner'],
            ['8206', 'left-to-right mark'],
            ['8207', 'right-to-left mark']
        ];
    }

    function charmapFilter(charmap) {
        return tinymce.util.Tools.grep(charmap, function (item) {
            return isArray(item) && item.length == 2;
        });
    }

    function getCharsFromSetting(settingValue) {
        if (isArray(settingValue)) {
            return [].concat(charmapFilter(settingValue));
        }

        if (typeof settingValue == "function") {
            return settingValue();
        }

        return [];
    }

    function extendCharMap(charmap) {
        var settings = editor.settings;

        if (settings.charmap) {
            charmap = getCharsFromSetting(settings.charmap);
        }

        if (settings.charmap_append) {
            return [].concat(charmap).concat(getCharsFromSetting(settings.charmap_append));
        }

        return charmap;
    }

    function getCharMap() {
        return extendCharMap(getDefaultCharMap());
    }

    function insertChar(chr) {
        editor.fire('insertCustomChar', {chr: chr}).chr;
        editor.execCommand('mceInsertContent', false, chr);
    }

    function showDialog() {
        var gridHtml, x, y, win;

        function getParentTd(elm) {
            while (elm) {
                if (elm.nodeName == 'TD') {
                    return elm;
                }

                elm = elm.parentNode;
            }
        }

        gridHtml = '<table role="presentation" cellspacing="0" class="mce-charmap"><tbody>';

        var charmap = getCharMap();
        var width = Math.min(charmap.length, 25);
        var height = Math.ceil(charmap.length / width);
        for (y = 0; y < height; y++) {
            gridHtml += '<tr>';

            for (x = 0; x < width; x++) {
                var index = y * width + x;
                if (index < charmap.length) {
                    var chr = charmap[index];

                    gridHtml += '<td title="' + chr[1] + '"><div tabindex="-1" title="' + chr[1] + '" role="button">' +
                        (chr ? String.fromCharCode(parseInt(chr[0], 10)) : '&nbsp;') + '</div></td>';
                } else {
                    gridHtml += '<td />';
                }
            }

            gridHtml += '</tr>';
        }

        gridHtml += '</tbody></table>';

        var charMapPanel = {
            type: 'container',
            html: gridHtml,
            onclick: function (e) {
                var target = e.target;

                if (/^(TD|DIV)$/.test(target.nodeName)) {
                    if (getParentTd(target).firstChild) {
                        insertChar(tinymce.trim(target.innerText || target.textContent));

                        if (!e.ctrlKey) {
                            win.close();
                        }
                    }
                }
            },
            onmouseover: function (e) {
                var td = getParentTd(e.target);

                if (td && td.firstChild) {
                    win.find('#preview').text(td.firstChild.firstChild.data);
                    win.find('#previewTitle').text(td.title);
                } else {
                    win.find('#preview').text(' ');
                    win.find('#previewTitle').text(' ');
                }
            }
        };

        win = editor.windowManager.open({
            title: "Special character",
            spacing: 10,
            padding: 10,
            items: [
                charMapPanel,
                {
                    type: 'container',
                    layout: 'flex',
                    direction: 'column',
                    align: 'center',
                    spacing: 5,
                    minWidth: 160,
                    minHeight: 160,
                    items: [
                        {
                            type: 'label',
                            name: 'preview',
                            text: ' ',
                            style: 'font-size: 40px; text-align: center',
                            border: 1,
                            minWidth: 140,
                            minHeight: 80
                        },
                        {
                            type: 'label',
                            name: 'previewTitle',
                            text: ' ',
                            style: 'text-align: center',
                            border: 1,
                            minWidth: 140,
                            minHeight: 80
                        }
                    ]
                }
            ],
            buttons: [
                {
                    text: "Close", onclick: function () {
                    win.close();
                }
                }
            ]
        });
    }

    editor.addCommand('mceShowCharmap', showDialog);

    editor.addButton('charmap', {
        icon: 'charmap',
        tooltip: 'Special character',
        cmd: 'mceShowCharmap'
    });

    editor.addMenuItem('charmap', {
        icon: 'charmap',
        text: 'Special character',
        cmd: 'mceShowCharmap',
        context: 'insert'
    });

    return {
        getCharMap: getCharMap,
        insertChar: insertChar
    };
});
